4AB › Chemistry PYQ › CSIR NET › June 2011

1. Q1 — The highest occupied MO in N₂ and O₂⁺ respectively are (take x-axis as internuclear axis) · Chemical Bonding
2. Q2 — In the EPR spectrum of tetragonal Cu(II) complex, when g∥ > g⊥ > ge, the unpaired electron resides in the · Inorganic Spectroscopy
3. Q3 — The electronic configuration for gadalonium (Gd) is [Xe]4f⁷ 5d¹6s², where as that of Gd²⁺ is: · Lanthanides and Actinides
4. Q4 — Uranium fluorides co-precipitate with · Lanthanides and Actinides
5. Q5 — The oxidative addition and reductive elimination steps are favoured by · Organometallic Compounds
6. Q7 — Oxidation occurs very easily in case of · Organometallic Compounds
7. Q8 — Complex in which organic ligand is having only σ-bond with metal is: · Organometallic Compounds
8. Q10 — The two compounds given below are and · General Organic Chemistry
9. Q11 — In the most stable conformation of trans-1-t-butyl-3-methylcyclohexane, the substituents at C–1 and C–3 · General Organic Chemistry
10. Q12 — Among the carbocations given below (A) (B) (C) · General Organic Chemistry
11. Q13 — The relative rates of solvolysis of iodides A-C are · General Organic Chemistry
12. Q14 — The correct order of acidity of the following compound A-C is: · General Organic Chemistry
13. Q15 — The IUPAC name of the following compound is · General Organic Chemistry
14. Q17 — With respect to electrophilic aromatic substitution, reactivity order of pyrrole, pyridine and indole is · General Organic Chemistry
15. Q18 — An optically active compound enriched with R-enantiomer (60% ee) exhibited [α]D+90°. If the [α]D value of the · General Organic Chemistry
16. Q20 — The major product formed on nitration (HNO₃/H₂SO₄) of uridine followed by reduction with tin and HCl is: · Natural Products
17. Q22 — In the mass spectrum of the compound given below, during the α-cleavage, the order of preferential loss of · Organic Spectroscopy
18. Q23 — The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · Pericyclic Reactions
19. Q25 — The concerted photochemical reaction between two olefins leading to a cyclobutane ring is: · Photochemical Reactions
20. Q26 — The major product formed in the reaction given below is: I₂/KI · Reagents, Reaction Mechanisms & Named Reactions
21. Q28 — The intermediate A and the major product B in the following conversion are A B · Reagents, Reaction Mechanisms & Named Reactions
22. Q29 — The major product formed in the following reaction is: + · Reagents, Reaction Mechanisms & Named Reactions
23. Q31 — The major product formed in the following reaction is: 2. MeI · Reagents, Reaction Mechanisms & Named Reactions
24. Q33 — The major product formed in the following transformation is: · Reagents, Reaction Mechanisms & Named Reactions
25. Q34 — The term symbol of a molecule with electronic configuration (1σg)²(1σu)²(2σg)²(2σu)²(2πu)¹(2πu)¹ is: · Atomic and Molecular Term Symbol
26. Q36 — For an aqueous solution at 25°C, the Debye-Huckel limiting law is given by · Electrochemistry
27. Q38 — For an assembly of molecules (molar mass =M) at temperature T, the standard deviation of Maxweller's speed is · Gaseous State
28. Q39 — The virial expansion for a real gas can be written in either of the following forms: PV/RT = 1 + BP P + CP P² · Gaseous State
29. Q40 — The microwave spectrum of a molecule yields three rotational constants. The molecule is · Molecular Spectroscopy
30. Q43 — The hermitian conjugate of operator d / d x, called (d / d x), is actually equal to · Quantum Chemistry
31. Q44 — The energy levels for cyclobutadiene are α + 2β, α, α and α - 2β. The delocalization energy in this molecule · Quantum Chemistry
32. Q45 — For a certain particle encountering a barrier, the tunneling probability is approximately e⁻¹⁰. If the mass · Quantum Chemistry
33. Q46 — An operator A is defined as A=-d/d x+x. Which one of the following statements is true? · Quantum Chemistry
34. Q50 — The correct order of acidity among the following species is · Acid and Bases
35. Q52 — Thermometric titration gives best results when A. |Δ H| is high B. Δ G<0 C. Heat of mixing of titrant with · Analytical Chemistry
36. Q53 — The FALSE statement for a polarographic measurement procedure is: · Analytical Chemistry
37. Q54 — The ligand system present in vitamin B₁₂ is: · Bioinorganic Chemistry
38. Q55 — Among SF₄⁻, BF₄⁻, XeF₄, and ICl₄⁻, the number of species having two lone pair of electrons central atom · Chemical Bonding
39. Q56 — In the molecules H₂ O, NH₄ and CH₄ · Chemical Bonding
40. Q57 — According to VSEPR theory, the molecule/ion having ideal tetrahedral shape is · Chemical Bonding
41. Q58 — The highest occupied MO in N₂ and O₂⁺respectively are (take x -axis as internuclear axis) · Chemical Bonding
42. Q59 — The molecule with highest number of lone-pairs and has a linear shape based on VSEPR theory is: · Chemical Bonding
43. Q60 — The number of anti-bonding electrons in NO and CO according to MO theory are respectively. · Chemical Bonding
44. Q61 — Among the following pairs, those in which both species have similar structures are: (A) N₃⁻, XeF₂ (B) · Chemical Bonding
45. Q62 — Match list I (compounds) with list II (structures), and select the correct answer using the codes given below. · Chemical Bonding
46. Q63 — Ni (CN₄)²⁻ and Ni (Cl₄)²⁻ complex ions are : · Coordination Chemistry
47. Q64 — According To Crystal Field Theory, Ni²⁺ can two have unpaired electrons in · Coordination Chemistry
48. Q65 — The term symbol of a molecule with electronic configuration: (1σg)²(1σu)²(2σg)²(2σu)²(1πu)¹(1πu)¹ is: · Coordination Chemistry
49. Q66 — Consider two redox pairs: (1) Cr(II)/Ru(III) (2) Cr(II)/Co(III) The rate of acceleration in going from a · Coordination Chemistry
50. Q67 — The complex [Mn(H₂O)₆]⁺² has very light pink colour. The best reason for it is · Coordination Chemistry
51. Q68 — The correct order of LMCT energies is: · Coordination Chemistry
52. Q69 — For the complexes (A) [Ni(H₂O)₆]²⁺ (B) [Mn(H₂O)₆]²⁺ (C) [Cr(H₂O)₆]³⁺ (D) [Ti(H₂O)₆]³⁺ the ideal octahedral · Coordination Chemistry
53. Q70 — The possible J values for ³D term symbol are · Coordination Chemistry
54. Q71 — Which of the following compound show a charge-transfer band? · Coordination Chemistry
55. Q72 — Cis and trans complexes of the type [PtA²X²] are distinguished by · Coordination Chemistry
56. Q74 — Consider the compounds, (A) SnF₄(B) SnCl₄ and (C) R₃ SnCl. The nuclear quadrupole splitting are observed for. · Inorganic Spectroscopy
57. Q75 — The correct value of isomer shift (in Mossbauer spectra) and its explanation for Fe(II)-TPP and Fe(III)-TPP · Inorganic Spectroscopy
58. Q76 — The low temperature (-98°C) ¹⁹F NMR spectrum of SF₄, shows doublet of triplets with the point group symmetry. · Inorganic Spectroscopy
59. Q77 — Among the following statements, identify the correct ones for complexes of lanthanide (III) ion. (A) · Lanthanides and Actinides
60. Q78 — Statement I: The sizes of Zr and Hf are similar Statement II: Size of Hf is affected by lanthanide · Lanthanides and Actinides
61. Q79 — The correct order of stability of difluorides is: · Main Group Elements
62. Q80 — Alkali metal superoxides are obtained by the reaction of · Main Group Elements
63. Q81 — Match List-I (compounds) with List-II (application) and select the correct answer using the codes given below · Main Group Elements
64. Q83 — Consider the nuclear reaction ₉₂ X²³⁴+β+α → Y+γ+2 β⁺ Y is · Nuclear Chemistry
65. Q84 — The species ¹⁹ Ne and ¹⁴ C emit a positron and β-particle respectively. The resulting species formed are · Nuclear Chemistry
66. Q85 — Among the metals Mn, Fe, Co and Ni, the ones those would react in its native form directly with CO giving · Organometallic Compounds
67. Q86 — In the H₂ Ru₆(CO)₁₈ cluster, containing 8-coordinated Ru centers, the hydrogen atoms are · Organometallic Compounds
68. Q87 — In the hydroformylation reaction, the intermediate CH₃CH₂CH₂Co(CO)₄ : · Organometallic Compounds
69. Q89 — The absorption at λmax =279 nm (ε=15) in the UV spectrum of acetone is due to · Organic Spectroscopy
70. Q90 — In the broad band decoupled ¹³C NMR spectrum, the numbers of signals apperating for the bicyclooctane A-C · Organic Spectroscopy
71. Q91 — In the mass spectrum of dichlorobenzene the ratio of the peaks at m/z 146, 148 and 150, is: · Organic Spectroscopy
72. Q93 — An organic compound A (C₈ H₁₆ O₂) on treatment with an excess of methyl-magnesium chloride generated two · Organic Spectroscopy
73. Q94 — The reaction given below is an example of Δ · Pericyclic Reactions
74. Q95 — The concerted photochemcial reaction between two olefins leading to a cyclobutane ring is : · Pericyclic Reactions
75. Q96 — The structures of the major products X and Y in the following transformation are + Δ X hν Y · Pericyclic Reactions
76. Q97 — The intermediate involved in the reaction given below is : · Photochemical Reactions
77. Q98 — The concerted photochemical reaction between two olefins leading to a cyclobutance ring is : · Photochemical Reactions
78. Q99 — For an assembly of molecules (molar mass = M) at temperature T, the standard deviation of Maxweller's speed · Atomic and Molecular Term Symbol
79. Q101 — The half-life of a zero order reaction (A → P) is given by (k= rate constant): · Chemical Kinetics
80. Q102 — The decomposition of gaseous acetaldehyde at T(K) follows second order kinetics. The half-life of this · Chemical Kinetics
81. Q103 — For an enzyme catalyzed reaction, a Lineweaver-Burk plot gave the following data: slope = 40 s, intercept = 4 · Chemical Kinetics
82. Q104 — Observe the following aqueous solutions of same compound. All the measurements are made at same wavelength · Chemical Kinetics
83. Q105 — 1.0 ohm⁻¹ dm² mol⁻¹, respectively, the solubility (in g L⁻¹) of the salt in water at 25°C is · Electrochemistry
84. Q107 — If the ratio of composition of oxidized and reduced species in electrochemical cell, is given as · Electrochemistry
85. Q108 — Given the character table of the point group C3 V Consider the reducible representation, Γ Its irreducible · Group Theory
86. Q109 — Refer to the character table of the point group C3v given above. Find which of the following transition is · Group Theory
87. Q111 — Among the following, the CORRECT statement is: · Group Theory
88. Q112 — A square pyramidal, MX₄, molecule belongs to C4v point group. The symmetry operations are: E, 2C₄, C₂, 2σv · Group Theory
89. Q113 — Character table of C2v point group is: If the initial and final states belong to A₁ and B₁ irreducible · Group Theory
90. Q114 — The molecular that has an S₆ symmetry element is · Group Theory
91. Q115 — The number of IR active vibrational modes of pyridine is: · Group Theory
92. Q116 — A molecules contains the following symmetry operations: E, 2C₆, 2C₃, C₂, 3σd, 3σv. The number of classes and · Group Theory
93. Q118 — Identify the point group symmetry of the following molecule (all C-C bond lengths are equal) · Group Theory
94. Q119 — The transition that is allowed by x-polarized light in trans-butadiene is (The character table for C2h is · Group Theory
95. Q120 — The symmetry point group of propyne is · Group Theory
96. Q121 — Number of rotational symmetry axes for triclinic crystal system is · Group Theory
97. Q122 — The E × E direct product in D₃ point group contains the irreducible representations · Group Theory
98. Q123 — The result of the product C₂(x)C₂(y) is · Group Theory
99. Q124 — A molecule, AX, has a vibrational energy of 1000 cm⁻¹ and rotational energy of 10 cm⁻¹. Another molecule, BX · Molecular Spectroscopy
100. Q125 — At room temperature, which molecule has the maximum rotational entropy? · Molecular Spectroscopy
101. Q126 — The Q band in the vibrational spectrum of acetylene is observed in the · Molecular Spectroscopy
102. Q127 — In IR spectrum of [Co(CN)₅H]³⁻ the Co–H stretch is observed at 1840 cm⁻¹. The (Co–D) stretch in [Co(CN)₅D]³⁻ · Molecular Spectroscopy
103. Q129 — The uncertainty in the NMR frequency of a compound in liquid state (relaxation time = 1 s) is 0.1 Hz. The · Molecular Spectroscopy
104. Q130 — The NMR spectrum of AX, exhibits lines at δ=2.1 and 2.3 ppm (for X type protons) and = 4.1, 4.3, 4.5 and 4.7 · Molecular Spectroscopy
105. Q132 — Saturation factor in neutron activation analysis is (A = induced radioactivity, ψ = neutron flux, σ = · Nuclear Chemistry
106. Q133 — The penetrating power (R) and ionizing power (I) of α, β, and γ rays follow the ordering · Nuclear Chemistry
107. Q134 — The reactive cross section is expected to be the largest for the reaction · Nuclear Chemistry
108. Q136 — There are several types of mean molar masses for polymer and they are dependent on experimental methods like · Polymer Chemistry
109. Q138 — A constant of motion is defined by the equation: · Quantum Chemistry
110. Q139 — The unperturbed energy levels of a system are ε₀=0, ε₁=2 and ε₂=4. The second order correction to energy for · Quantum Chemistry
111. Q140 — The energy levels for cyclobutadiene are α + 2β, α, α and α - 2β. The delocalization energy in this molecule · Quantum Chemistry
112. Q142 — An operator A is defined as A=-d / dx+x. Which one of the following statements is true? · Quantum Chemistry
113. Q143 — For a H₂ molecule, the ground state wave function is ψ 1,2 = φ 1,2 σ(1, 2) where φ refers to the space part · Quantum Chemistry
114. Q144 — A hydrogenic orbital with radial function of the form rα exp [-β r] and φ-part as exp [-3 i φ] corresponds to · Quantum Chemistry
115. Q145 — A one-dimensional crystal of lattice dimension 'a' is metallic. If the structure is distorted in such a way · Solid State Chemistry
116. Q147 — The term symbol for the ground state of nitrogen atoms is · Statistical Thermodynamics
117. Q149 — Isothermal which has fractional coverage, linearly, dependent1 on pressure at low pressures but almost · Surface Chemistry
118. Q150 — A process is carried out at constant volume and at constant entropy. It will be spontaneous if: · Thermodynamics
119. Q151 — The chemical potential of component 1 in a solution of binary mixture is μ₁ = μ₁⁰ + RTln p₁, when p₁ is the · Thermodynamics
120. Q153 — Identify the order according to increasing stability of the following organometallic TiMe₄, Ti (CH₂ Ph)₄ · Organometallic Compounds

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